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Message-Id: <1373552708-15235-81-git-send-email-luis.henriques@canonical.com>
Date: Thu, 11 Jul 2013 15:24:50 +0100
From: Luis Henriques <luis.henriques@...onical.com>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
Cc: Stanislav Kinsbursky <skinsbursky@...allels.com>,
Trond Myklebust <Trond.Myklebust@...app.com>,
Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 80/98] SUNRPC: PipeFS MOUNT notification optimization for dying clients
3.5.7.17 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Stanislav Kinsbursky <skinsbursky@...allels.com>
commit 4f6bb246f69443549fbbd0f2abaf863243cb35e9 upstream.
Not need to create pipes for dying client. So just skip them.
Note: we can safely dereference the client structure, because notification
caller is holding sn->pipefs_sb_lock.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
net/sunrpc/clnt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 631a75d..e0fd6a7 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -179,6 +179,8 @@ static inline int rpc_clnt_skip_event(struct rpc_clnt *clnt, unsigned long event
if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) ||
((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry))
return 1;
+ if ((event == RPC_PIPEFS_MOUNT) && atomic_read(&clnt->cl_count) == 0)
+ return 1;
return 0;
}
--
1.8.1.2
--
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